德国总理默茨：对欧盟与美国的贸易协议持谨慎乐观态度。

Group 1 - The core viewpoint is that German Chancellor Merz expresses cautious optimism regarding the trade agreement between the EU and the US [1] Group 2 - The statement reflects a positive outlook on potential economic collaboration and trade benefits for both regions [1] - The cautious approach indicates awareness of the complexities and challenges involved in finalizing such agreements [1]